Best way to get access to Windows interface?

macrumors 65816

Every now and then, there are times when I need a full-blown OS to do something, such as accessing sites that are IE-only compatible - something I can't do with the iPad. I thought OnLive would work since it provides remote access to a computer running Windows 7, but apparently the free plan doesn't let you browse other sites.

If I want access to a Windows 7 interface, is my only option, short of carrying a laptop, to run a VNC server on my iMac at home (while it's running VMWare)?

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